My experience has been quite the opposite. My Matter-over-Thread devices have proven to be very reliable. In the rare cases where a device drops offline (which happens maybe once a year and only with battery-powered devices), simply removing and reinserting the battery has always resolved the issue.
In contrast, I experienced more issues with Zigbee devices on Hubitat. Even mains-powered devices occasionally went offline, including devices installed in wall boxes, which then required re-pairing. That said, this may not be a limitation of Zigbee itself, as Zigbee has been rock solid for me when used with a Hue Bridge and Hue devices.
It’s also worth noting that my Matter devices are currently paired with Apple Home, not Homey. For reference, my overall setup is shown here:
